Valve



Nov. 11,1925.

P. D. sc :HEN'cK VALVE y Filed aan. 1 8, 1924A z sheets-sht 1 gia/44%NOV17, P. D' SCHENCK VALVE Filed Jan. 18, 1924 2 Sheets-Sheet 2 vINVENTOR ly ofthe valve. section' through a modification.

Patented Nov. 17,l

UNITED STATES` y 1,562,195 PATENT oEFicE.

PEIRCE D. SCHENCK, OF DAYTON, OHIO, ASSIGOR'TO THE DURIBON COMPANY,INC.,

A CORPORATION OF NEW YORK.

VALVE.

Application med January 1s, 1924. serial N6. 687,101.

To all who-1n t mag/'concern Be it known that I, PEIRCE D.v SCHENCK, acitizen of the United States, and a resident of Dayton, in the countyofV Montgomery and State of Ohio, have made-a new and use- `uids. Theinvention has for its principal objects; the provision of an improvedplug valve packing construction adapted to apply pressure to the packingin such manner that a tight joint around the 'valve stem is securedwithout rendering the valve difficult to turn in its tapering seat; andthe provision of a construction in which the valve body is protectedfrom undue strain, partieularly tensile strain, incident to the attachment of the valve to its pipe connec tions, this feature being ofspecial utility where the valve body is of brittle corrosion resistingcomposition and of low tensile strength. Certain embodiments of theinvention are illustrated in the accompanying drawings wherein z' YFigure 1 is a vertical section through the valve on the line I-I of Fig.3. Fig.l 2 is a section through the valve at right angles tothe sectionof Fig., 1 on the l1ne II-Il of Fig. 3, with the pi connections for thevalve shown in dotte lines. Figs. 3 and 4 are plan and side elevationviews respective- Anda-Fig. 5.is a partial Referring to the drawings,1is the valve body or casing preferably of corrosion resisting material,suchas high silicon iron which is hard and brittle and of-relatively lowtensile strength. vThis body has the usual tapering seat,-'in whichfits.the valve. plug 2, preferabl eplughasastem3,to"fl s' I ar to that ofthe'clamping plates 16 and of the same material 'as the valve body.

-hich an operatingvhandle (not shown) mayY vid plied.'Ihebotlylorcasinglsalso atitsendswiY packing :m: rymgthe followersand,whichare flanges the ward by the pairs of bolts 8, 8 and 9, 9. Thebottom of the 4packing recess surrounding the stem 3 comprises theshoulder 10, formed 1n the casing, and the 4shoulder 11 at the upper endof the plug. A metal ring 12 is preferablyT7 employed intermediate thetwo shoulders and the packing 4. The inner end of the follower .G is outaway as indicated at 13, so that all the pressure from the follower isapplied in alignment with the shoulder 10,and only a slight amount ofpressure is applied to the shoulder 11. As

a result, the follower may be forced in tightly without pressing theplug down too tightlyinto its tapering seat, and thus rendering 1t.dilicult to turn. At the Sametime, the

` pressure of the follower tends-to spread the vpacking laterally sothat itspressure against the stem is suflicient to prevent leakage alongthe stem..

At the other end a plunger 14 is employed in opposition to the end ofthe plug 2, which plunger may be forced upward by impact, 1n order toloosen the plug, in casey it be# comes stuck in its seat. The followercon struction isthe same as that of the follower 6, the inner end beingcut away as indicated at 15. When the follower 7 is tightened, the

h'eadof 'the plunger is out` of contact withI the lower end of the plug2 as illustrated.

If the plug becomes'stuck, 1t may be loosenedby striking the end of theplunger which in turn strikes the plug, y

vThe valve body 1 1s c amped between the pair of plates 16 and 17 bymeansv of the four` olts 18, which are tightened, so as to apply acompressive stress upon the valve body and seat the platesfvery rmlyagainstnthe sides of such body.' These plates are. of a tougher,stronger. material than the body of the valve, such as cast steel orwrought metal. The valve body has they inlet and outlet passages 19 and20, and in opposition 'to' these passages, are the inlet and outlet ipipes 21.. and'22with suitable gaskets 23 interposed between the endsofthe pipes and the passages, Incase the valve body is of corrosiveresisting material, these pipes will preferably be of similar comosltion, and

. .l 24' of stronger, toug er `material 17, be employe being preferablyaprio I of the pipes, in case such pipes were of ordi' 'be employed, andthe spacing of the bolts arranged in other ways.

Fig. illust-rates a modificationin which the pressure at the lower endof the follower 26 is localized above the shoulder 10 by the use of thering 9.7 instead of by cutting the lowen edge of the follower away as inthe first form of construction.

The use of the construction for localizing the pressure by the followerabove the shoulder gives a valve in; which the plug is readily1 turnedand which, at the same time, is free from leakage. The plates 16 and 17make the valve much stronger and safer, which is of special impor-tancein handling corrosive liquids.v The valve body is relieved ofpractically all tensile strains inci denty to pressure and to thetemperature changes in the piping, the strain being transferred t0 theclamping pla-tes which have suiicient strength to eliminate any dangerof fracture. The provision of theplunger 14 arranged so that it may bedriven upward against the plug gives a very positive means for looseningit in case it becomes stuck, as the plug may be loosened very easily andquickly-by merely striking the plunger a light blow, and withoutloosening or tightening any bolts or nuts. Other advantages incident tothe construction will be readily apparent to those skilled in the art.

What I claim is: v

1. In combination in a plug valve, a valve casing having a taperingseat, and a pack# ing recess terminating in a shoulder, atapering plugfitting'the-iseat and'having a stem with a shoulder at thejuncture oft-he plug and stem opposite said first shoulder in alignment therewith,a metal ring lying in said recess and engaging both of said shoulders,packing means filling the recess onthe outer side of said ring, and afollower arranged to apply pressure to the packing at its outerportion,but out of contactlthercwith at its inner portion.

`pering seat, a tapering plug stem opposite said first shoulder inalign-n ment therewith, a metal ring in Said recess y and having a stemextending through the opening` at one end of the casing, packing meansfor said stem, a packing recess at the other end of the casing having ashoulder at its inner end for engaging the packing `meansemployed,packing means in said recess, and a plunger extending through thefollower' and packing and having a headat its inner end adapted toengage the inner end of the plug.

ll. In combination, a valve body or casing open at both endsand providedwith a tafitti-ng the seat and having a stein extending through theopening at one end of the casing, packing means for said stem, a packingrecess at the other end of the casing having a shoulder at its inner endfor engaging the packingmeans employed, packing means `in said recess,and a plunger extending through the follower and packing and having ahead at its inner end adapted .to engage the inner end of the plug, saidhead being out -of contact with the end of the plug when the-follower iSin operative position with the packing compressed between said shoulderand the follower. Y

5. In combination, an integral valve body of relatively brittlecorrosion resisting metal having tubular inlet and outlet membersprojecting from opposite Asides thereof, a valve in the body extendingtransversely of said members, a clamping plate on each side of the valvebody of relatively strong, tough metal surrounding said inlet and outletmembers, bolts extending between the two plates securing them togetherand clamping the valve body tightly therebetween` each of said platesbeing provided with perferations so that itmay be bolted to the flangeplate of an opposing pipe connection, and the ends of said inlet andoutlet members projecting through said clamping plates to permit. themto be brought into abutting relation with the ends of said pipeconnections.

In testimony whereof, I have hereunto subscribed my name this 16th dayof January, 1924. y l

. PEIRCE D. SCI-IENCK.

